CN103394546B - Production method for longitudinal welded pipe - Google Patents
Production method for longitudinal welded pipe Download PDFInfo
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- CN103394546B CN103394546B CN201310366055.XA CN201310366055A CN103394546B CN 103394546 B CN103394546 B CN 103394546B CN 201310366055 A CN201310366055 A CN 201310366055A CN 103394546 B CN103394546 B CN 103394546B
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Abstract
A disclosed production method for a longitudinal welded pipe successively comprises the following steps of hot-rolled coil decoiling, shearing and butt welding, looping, edge milling, coil flaw detection, cage roll forming, on-line pipe blank prewelding, welding of end tabs to pipe ends, on-line internal welding by employing submerged arc welding, on-line external welding by employing submerged arc welding, sizing and saw cutting, end tab removing, blowing and sweeping of welding slags, pipe end grinding, X-ray, expanding, chamfering, water pressing, ultrasonic flaw detection, X-ray, magnetic powder flaw detection, length measuring and weighing, mark spraying and warehousing. Practice proves that the production method of the longitudinal welded pipe is simple in operation and high in production efficiency.
Description
Technical field
The invention belongs to ERW production technical field, specifically refer to a kind of ERW production method.
Background technology
Straight-line joint submerged arc welding tube production technology is very ripe in China, and its weld properties is excellent and thus extensively promoted higher than body.Traditional straight-line joint submerged arc welding tube pipe-making method has JCOE and UOE, and which kind of method is all by shaping by forming machine for individual hot rolled plate of cut lengths, then carries out submerged arc welding and produces.
Traditional straight-line joint submerged arc welding tube pipe-making method, its raw material can only choose individual hot rolled plate, or hot rolled coil is carried out out flat, cut into single steel plate, and can not directly use hot rolled coil to carry out online formation rolling, the serious production efficiency that have impact on welded tube.
The patent No. is the production method that 200710033068.X granted patent discloses a kind of large straight-line joint submerged arc welding tube, it adopts the continuous row-roll forming process of coiled strip, online prewelding, then off-line automatic submerged arc welding is utilized to carry out interior weldering and the outside weld of welded tube, expanding, hydraulic pressure, Non-Destructive Testing, thus realize the High-efficient Production of large straight-line joint submerged arc welding tube product.Although the more traditional submerged-arc welded (SAW) pipe of this production method is produced and improve certain production efficiency, it still adopts off-line automatic submerged arc welding to carry out interior weldering and the outside weld of welded tube, submerged-arc welding produce be still single welded tube by propping up a welding processing, have impact on production efficiency.
In addition, the patent No. be 201110003728.6 granted patent describe a kind of straight-line joint submerged arc welding tube manufacture method, its key step comprises that steel band uncoiling, docking, plate edge machined, shaping, on-line continuous prewelding, Pipe Cutting, Lincoln weld are astute and able, finishing, it is characterized in that: described forming step adopts the forming method of alternating-current resistance welded tube, and the forming method of alternating-current resistance welded tube is continuous bend method, circular arc bending method or combination forming method.This manufacture method provides multiple forming method, but still adopts off-line submerged-arc welded (SAW) pipe to produce, and have impact on the production efficiency of welded tube.
Summary of the invention
Object of the present invention will provide a kind of simple to operate exactly, the ERW production method that production efficiency is high.
For achieving the above object, ERW production method of the present invention, its special character is: it comprises the following steps successively: hot rolled coil uncoiling, shears butt welding, kink, milling limit, plate body is detected a flaw, row-roll forming process, online pipe prewelding, tube head weldering run-on tab, weldering in submerged-arc welding is online, the online outside weld of submerged-arc welding, scale sawing, removes run-on tab, and welding slag purges, pipe end polishing, X-ray, expanding, chamfered edge, hydraulic pressure, ultrasonic examination, X-ray, magnetic powder inspection, surveys long weighing, spray mark warehouse-in.
Further, described shearing butt welding refers to hot rolled coil crop, back-end crop, and then the end of reel of last volume and the volume head of a rear volume carry out butt welding, and the hot rolled coil of same specification is connected together.
Further, in described submerged-arc welding is online during weldering, internal welding machine be arranged on prewelding and shaping between, internal welding machine stretches in pipe, and welding head is motionless, is welded by the on-line operation of welded tube pipe, in welding process, first prewelding, rear interior weldering.
Also preferably, during the online outside weld of submerged-arc welding, outside weld seat in the plane is put fixing, is welded by the on-line operation of welded tube pipe.
ERW production method of the present invention, adopt hot rolled coil as welded tube forming raw material, first hot rolled coil is carried out uncoiling, to hot rolled coil crop, back-end crop, then the volume head of the end of reel of last volume and a rear volume is carried out butt welding, the hot rolled coil of same specification is connected together; Hot rolled plate after uncoiling enters large-scale kink, can play the effect of the storage of raw materials and buffering; Hot rolled plate carries out milling limit, plate body flaw detection by edge milling machines, enters row-roll forming process unit, and utilizing row-roll forming process to make raw material continuously shaped is pipe; Online prewelding, tube head weldering run-on tab are carried out to pipe, stretches into submerged arc internal welding machine in shaping pipe flared end and carry out weldering online, then carry out the online outside weld of submerged-arc welding, scale sawing; Remove run-on tab to first welded tube, welding slag purging, pipe end polishing, then carry out ultrasonic examination, x-ray inspection; Welded Pipe carries out expanding, carries out chamfered edge to pipe end, and water inlet press carries out pressure test; Carry out ultrasonic examination, x-ray inspection, magnetic powder inspection afterwards; Finally survey long weighing, by qualified welded tube spray mark warehouse-in.
Feature of the present invention is: adopt hot rolled coil as raw material, decrease hot rolled coil is carried out out flat, the process of cutting, reduce production cost, simultaneously, adopt row-roll forming process+online prewelding+online submerged-arc welding process, make welded tube forming, prewelding, submerged-arc welding realizes continuous online production, substantially increase the production efficiency of straight-line joint submerged arc welding tube, in addition, production method of the present invention only needs when carrying out first production at shaping pipe top welding run-on tab, run-on tab is removed when carrying out finishing process to first welded tube, welding run-on tab is greatly reduced relative to prior art, arc-extinguishing plate and run-on tab of going out, the technique of arc-extinguishing plate, further increase production efficiency.
Detailed description of the invention
Below in conjunction with specific embodiment, ERW production method of the present invention is described in further detail.
A kind of production technology of Φ 323.9 × 8.7mm ERW, comprises the following steps:
To choose broadening be the hot rolled coil of 1020mm is raw material, and first hot rolled coil is carried out uncoiling, to hot rolled coil crop 2m, back-end crop 2m, then the end of reel of last volume and the volume head of a rear volume carry out butt welding, and the hot rolled coil of same specification is connected together; Hot rolled plate after uncoiling enters large-scale kink, and large-scale kink plays the effect of the storage of raw materials and buffering; Hot rolled plate carries out milling limit, plate body flaw detection by edge milling machines, enters row-roll forming process unit, and utilizing row-roll forming process to make raw material continuously shaped is pipe; Online prewelding is carried out to pipe, then tube head weldering run-on tab, weldering in submerged-arc welding is online, the online outside weld of submerged-arc welding; Wherein, in submerged-arc welding is online during weldering, internal welding machine be arranged on prewelding and shaping between, internal welding machine stretches in pipe, and welding head is motionless, is welded by the on-line operation of welded tube pipe, in welding process, first prewelding, rear interior weldering; During the online outside weld of submerged-arc welding, outside weld seat in the plane is put fixing, is welded by the on-line operation of welded tube pipe; Carry out online scale sawing again, cut lengths is 12m; Remove run-on tab, carry out welding slag purging, pipe end polishing, then carry out ultrasonic examination, x-ray inspection; Welded Pipe carries out expanding, carries out chamfered edge to pipe end, and water inlet press carries out pressure test; Carry out ultrasonic examination, x-ray inspection, magnetic powder inspection afterwards; Finally survey long weighing, by qualified welded tube spray mark warehouse-in.
Claims (3)
1. an ERW production method, is characterized in that: it comprises the following steps successively: hot rolled coil uncoiling, shears butt welding, kink, milling limit, plate body is detected a flaw, row-roll forming process, online pipe prewelding, tube head weldering run-on tab, weldering in submerged-arc welding is online, the online outside weld of submerged-arc welding, scale sawing, remove run-on tab, welding slag purging, pipe end polishing, X-ray, expanding, chamfered edge, hydraulic pressure, ultrasonic examination, X-ray, magnetic powder inspection, surveys long weighing, spray mark warehouse-in; Wherein, described shearing butt welding refers to hot rolled coil crop, back-end crop, and then the end of reel of last volume and the volume head of a rear volume carry out butt welding, and the hot rolled coil of same specification is connected together.
2. ERW production method according to claim 1, is characterized in that: in described submerged-arc welding is online during weldering, internal welding machine stretches in pipe, and welding head is motionless, is welded by the on-line operation of welded tube pipe, in welding process, and first prewelding, rear interior weldering.
3. ERW production method according to claim 1 and 2, is characterized in that: during the online outside weld of submerged-arc welding, outside weld seat in the plane is put fixing, is welded by the on-line operation of welded tube pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310366055.XA CN103394546B (en) | 2013-08-21 | 2013-08-21 | Production method for longitudinal welded pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310366055.XA CN103394546B (en) | 2013-08-21 | 2013-08-21 | Production method for longitudinal welded pipe |
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| CN103394546A CN103394546A (en) | 2013-11-20 |
| CN103394546B true CN103394546B (en) | 2015-06-03 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880809B (en) * | 2014-11-14 | 2018-06-12 | 宋国栋 | Middle steel pipes with straight upward multi-wire submerged-arc Welding and the bonding pad roll used online |
| CN104999277B (en) * | 2015-07-13 | 2017-03-22 | 天津钢管集团股份有限公司 | Production method of anticorrosion wear-resistant stainless steel HFW welding pipe with outer diameter of 108-660.4mm |
| CN105382545A (en) * | 2015-12-11 | 2016-03-09 | 河北沧海核装备科技股份有限公司 | Production equipment and technique for plate-strip dual-use continuous production straight-slit submerged-arc welded pipes |
| CN106239168A (en) * | 2016-08-01 | 2016-12-21 | 葫芦岛市钢管工业有限公司 | A kind of pre-soldering method of the ERW for LSAW steel pipe's production |
| CN113118230B (en) * | 2021-04-21 | 2023-05-12 | 中冶赛迪技术研究中心有限公司 | Composite technology for producing closed section steel through hot roll bending |
| CN116167396A (en) * | 2023-01-09 | 2023-05-26 | 太原重工股份有限公司 | Material tracking method for straight welded pipe |
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| CN1490097A (en) * | 2002-10-15 | 2004-04-21 | 赵春友 | Production of steel pipes with straight central seaming and primary shaping, final shaping and welder |
| CN1781655A (en) * | 2005-09-30 | 2006-06-07 | 番禺珠江钢管有限公司 | Process for producing welded pipe |
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| CN102000716A (en) * | 2010-11-30 | 2011-04-06 | 大连三高科技发展有限公司 | Production line of major diameter straight welded pipe |
| CN102274871A (en) * | 2011-08-02 | 2011-12-14 | 太原华科信冶金成套设备有限公司 | Method and equipment for producing longitudinal submerged arc welded pipe |
| CN102294571A (en) * | 2010-06-25 | 2011-12-28 | 上海月月潮钢管制造有限公司 | Method for manufacturing high-temperature and high-pressure steel pipe |
| CN102294553A (en) * | 2011-07-21 | 2011-12-28 | 北京工业大学 | Magnesium alloy brazing filler metal containing rare-earth element Er and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113921A (en) * | 1982-12-20 | 1984-06-30 | Nisshin Steel Co Ltd | Double square tube and its manufacturing device |
| JP2692542B2 (en) * | 1993-09-03 | 1997-12-17 | 住友金属工業株式会社 | Pipe welding method |
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- 2013-08-21 CN CN201310366055.XA patent/CN103394546B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490097A (en) * | 2002-10-15 | 2004-04-21 | 赵春友 | Production of steel pipes with straight central seaming and primary shaping, final shaping and welder |
| CN1781655A (en) * | 2005-09-30 | 2006-06-07 | 番禺珠江钢管有限公司 | Process for producing welded pipe |
| CN101214511A (en) * | 2007-12-29 | 2008-07-09 | 番禺珠江钢管有限公司 | Large straight-line joint submerged arc welding tube fast production process |
| CN102294571A (en) * | 2010-06-25 | 2011-12-28 | 上海月月潮钢管制造有限公司 | Method for manufacturing high-temperature and high-pressure steel pipe |
| CN102000716A (en) * | 2010-11-30 | 2011-04-06 | 大连三高科技发展有限公司 | Production line of major diameter straight welded pipe |
| CN102294553A (en) * | 2011-07-21 | 2011-12-28 | 北京工业大学 | Magnesium alloy brazing filler metal containing rare-earth element Er and preparation method thereof |
| CN102274871A (en) * | 2011-08-02 | 2011-12-14 | 太原华科信冶金成套设备有限公司 | Method and equipment for producing longitudinal submerged arc welded pipe |
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| CN103394546A (en) | 2013-11-20 |
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Effective date of registration: 20170720 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Hubei, Wuhan, Wuchang Friendship Road, No. 999, block A, floor 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
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